Plate 1 issued from : E.L. Markhaseva in Proc. Zool. Inst. RAN, St. Petersburg, 1996, 268. [p.277, Fig.221]. Female: (a) from NE Indian, other figures from SE Pacif.
Nota: Cephalothorax 3.7-4.2 times longer than urosome. Posterior corners of last thoracic segment symmetrical, rounded. Genital segment asymmetrical, with moderate knob-like projections on the left and right, of variable shape. Urosomal segments 1-3 covered with hairs. A1 as long as cephalothorax - reaching caudal rami. Exopodite of P1 unclearly 3-segmented. Endopodite of P2 indistinctly 2-segmented. Coxopodite of P4 with 6-9 spines.
Plate 2 issued from : E.L. Markhaseva in Proc. Zool. Inst. RAN, St. Petersburg, 1996, 268. [p.278, Fig.222]. Male (from SE Pacif.).
Nota: Cephalon and thoracic segment 1, as 4th and 5th segments fused. Cephalothorax about 3 times longer than urosome. Posterior corners of last thoracic segment with spines.Exopodite 1 of P1 with very small external spine. Endopodite of P2 virtually 2-segmented. Spines on coxopodite of P4 absent. Endopodal segment 2 of P5 with 3 teeth in distal part of segment; exopodal segment 3 with rounded top.
Plate 3 issued from : J.M. Bradford & J.B. Jillett in Mem. N.Z. oceanogr. Inst., 86, 1980. [p.74, Fig.50]. As Pseudochirella squalida. Female: A, genital segment (dorsal); B, inner edge of basipod 1 of P4.
Plate 4 issued from : G.D. Grice & K. Huisemann in Proc. U.S. natn. Mus., 1967, 122 (3583). [p.51, Figs.65-70]. As Pseudochirella squalida (from 29°45'S, 64°58'E). Female: 65, forehead (lateral); 66, last thoracic segment and urosome (lateral right side); 67, genital segment (dorsal); 68, idem (lateral left side); 69, A2; 70, P4.
Nota: Rostrum strong. A1 reaches furca. A2: 2nd endopodal segment with 7 setae on outer lobe and 9 setae on inner lobe. First basal segment of P4 with 6 coarse spines. Genital segment slightly asymmetrical and hairy, small rounded protuberances on each side.
Plate 5 issued from : F.D. Ferrari in Proc. Biol. Soc. Washington, 1993, 93 (3). [p.539, Fig.1]. As Pseudochirella squalida. Female (from NW Atlant.: off Delaware): A, urosome (dorsal); B, idem (ventral); E, habitus (lateral right side). Nota: Head and 1st thoracic segment fused dorsally and free laterally, 4h and5th fused.
Male: C, urosome (dorsal); D, habitus (lateral left side). Nota: Head and 1st thoracic segment fused, 4th and 5th fused. Posterior cephalothorax with small, slightly curved posterodistal spine on each side. Genital segment with genital opening on left side.
Plate 6 issued from : F.D. Ferrari in Proc. Biol. Soc. Washington, 1993, 93 (3). [p.540, Fig.2]. As Pseudochirella squalida. Female: A, A2; C, A1 (segments 1-13); D, idem (segments 14-21); E, idem (segments 22-25).
Male: B, A2; F, A1 (segments 1-13); H, idem (segments 14-21); G, idem (segments 22-25). Letters on proximal segments of A1.
Plate 7 issued from : F.D. Ferrari in Proc. Biol. Soc. Washington, 1993, 93 (3). [p.541, Fig.3]. As Pseudochirella squalida. Female: A, Md; C, Mx1 (posterior); E, Mx2 (posterior); F, mx2 (anterior); H, P2 (posterior); I, P3 (posterior).
Plate 8 issued from : F.D. Ferrari in Proc. Biol. Soc. Washington, 1993, 93 (3). [p.542, Fig.4]. As Pseudochirella squalida. Female: A, P4 (posterior); B, Mxp (posterior); D, genital segment (lateral right side); E, idem (lateral left side); F, idem, with spermatophore (lateral left side); G, idem (lateral right side).
Male: C, Mxp (posterior).
Plate 9 issued from : F.D. Ferrari in Proc. Biol. Soc. Washington, 1993, 93 (3). [p.544, Fig.5]. As Pseudochirella squalida. Female: A, P1 (anterior).
Male: C, P4 (posterior); D, P5 (posterior); E, idem (anterior); F, P1 (anterior).
Plate 10 Issued from : G.O. Sars in Résult. Camp. Scient. Prince Albert I, 69, pls.1-127 (1924). [Pl.XXIV, figs.7-12]. juvenil Female (from Azores Is. and Europa): 7, habitus (dorsal); 8, idem (lateral left side); 9, forehead (lateral).
Male: 10, habitus (dorsal); 11, posterior segment cephalothorax and 1st and 2nd urosomal segments (lateral left side); 12, P5.
Plate 11 issued from : R.B.S. Sewell in The John Murray Expedition, 1933-34, Scientific Reports, VIII (1), 1947. [p.99, Fig.21, D]. With doubt. Female stage V (from N Arabian Sea): D, Mx1.
Plate 12 Issued from : E.L. Markhaseva in USSR Acad. Sci., Zool. Inst., Explor. Fauna Seas. Marine Plankton, 1989, 41 (49). [p.53, Fig.23]. Female: Thoracic segment 5 and genital segment. Nota from the key: 1 - Genital segment asymmetrical. 2 - Thoracic posterior corners without spines. 3 - Thoracic posterior corners with rounded lobes. 4 - Thoracic posterior lobes symmetrical. 5 - Two small protuberances present on the left and one small on the right in posterior part of genital segment.
Plate 13Pseudochirella notacantha Male: 1 - Exopodite 2 of left P5 with 3 teeth in distal part of segment. 2 - Exopodite 2 of left P5 with 2 teeth in distal part of segment. 3 - Posterior corners of last thoracic segment with spines on each side.
Plate 14 issued from : F.D. Ferrari in Proc. Biol. Soc. Washington, 1993, 93 (3). [p.546-47, Table 2]. As Pseudochirella squalida. Characters which exhibit dimorphism in stage V or stage Vi and their state in the remaining stage.
Cph/Pg1: Cephalon and 1st thoracic segment; Pg4/Pg5: 4th and 5th thoracic segments; Pg points: characteristic of the posterior corners of thoracic segment 5; Ur: urosome; CR: caudal rami; Md: mandible; Mx1: maxillule; Mx2: maxilla; Mxp: maxilliped; P1-P5 swimming legs 1 to 5; Re: exopod; Ri endopod; B1: coxa; B2: basis; Li: inner lobe; Se: outer seta.
Map 4 Issued from : E.L. Markhaseva in Issled. Fauny Morei, 1989, 41 (49). [p.56, Fig.11]. Geographical distribution of P. notacantha. 1: from literature as P. squalida; 2, from literature; 3: present occurrences.
Antarct. (SW Atlant., Indian, SW & S Pacif.), South Georgia, Atlant. (temperate & boreal), G. of Guinea, off Mauritania, off Madeira, ? Bay of Biscay, Azores, Sargasso Sea, Station "S" (32°10'N, 64°30'W), off Delaware, off E Cape Cod, Davis Strait, S Iceland, off W Ireland, ? Arabian Sea, S Laccadive Is., SW Indian, Japan (in/em> Morioka, 1972 a, p.314), New Zealand, S Pacif., Juan Fernandez Is., S Peru, off Juan Fernandez Is., N-S Chile (sub-Antarct.).
epi- to bathypelagic. Sargasso Sea: 500-2000 m (Deevey & Brooks, 1977, station "S"); Sampling depth (Antarct.) : 0-750-1000+ m. The male described by With (1915) does not seem to be a synonym of any other species. Vervoort (1952 g) and Markhaseva (1996) do not agree on the synonymy between Chirudina parvispina in With (1915; from 61°30'N) and P. notacantha. For Grice & Hulsemann (1967, p.24) the female specimen resembles P. obesa.
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